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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
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To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

21020 results found.

  1. GRB 171205A: SAO-RAS optical observations
  2. GMRT upper limit on GRB 171205A
  3. GRB 171209A: Swift/UVOT Analysis of the burst
  4. Swift Trigger 796115 is probably not a GRB
  5. GRB 171205A: VLA detection
  6. GRB 171205A: UKIRT near-IR observations
  7. GRB 171209A: LCO 1-m telescope observations
  8. Swift Trigger 796098 is probably a noise peak near M31
  9. LIGO/Virgo GW170817: X-ray observations confirm prediction made from radio data
  10. LIGO/Virgo GW170817: Further Hubble Space Telescope observations
  11. LIGO/Virgo G298048: Brightening X-ray Emission from GW170817/GRB170817A/SSS17a
  12. GRB 171205A: TSHAO optical observations
  13. LIGO/Virgo GW170817: Chandra X-ray brightening of the counterpart 108 days since merger
  14. GRB 171205A: Continued Swift/UVOT Observations
  15. LIGO/Virgo G298048: Late-time detection of the X-ray afterglow with Chandra
  16. GRB 171205A: MASTER-SAAO optical observations of unusual OT
  17. GRB 171205A: GROND observations of the optical/NIR transient
  18. GRB 171205A: LCO 1-m telescope observations
  19. GRB171205A hyperluminal radio afterglow?
  20. GRB 171205A: GMG observations (2nd night)
  21. GRB 171205A: CHILESCOPE optical observations
  22. GRB 171205A: SMARTS optical/IR afterglow observations
  23. GRB 171205A: GOTO detection of the optical counterpart
  24. GRB 171205A: TNG NIR detections
  25. GRB 171205A: LSGT optical afterglow follow-up observation
  26. GRB 171205A: NOEMA detection of a bright mm afterglow
  27. GRB 171205A: GMG observation
  28. GRB 171205A: RATIR Optical and NIR Observations
  29. GRB 171205A: Swift/UVOT Detection
  30. GRB 171205A: VLT/X-shooter optical counterpart and spectroscopic observations
  31. GRB 171124A: TShAO optical observations
  32. GRB 171124A: Swift-XRT afterglow detection
  33. Pan-STARRS follow-up of IceCube-171106A
  34. LIGO/Virgo G299232: LOFAR follow-up
  35. INTEGRAL pointed follow-up of IceCube-171106A
  36. GRB 171123A: OSN Upper Limit
  37. GRB 171124A: Swift-XRT observations
  38. GRB 171123A: Tautenburg observations
  39. GRB 171123A: RATIR Optical and NIR Observations
  40. GRB 171123A: Swift/UVOT Upper Limits
  41. GRB 171123A: GMG observation limit
  42. GRB 171124A: Swift ToO observations
  43. GRB 171123A: Confirmation of the X-ray afterglow
  44. GRB 171120A: Swift/UVOT Upper Limits
  45. Fermi-LAT Gamma-ray Observations of IceCube-171106A
  46. GRB 171115A: RATIR Optical and NIR Observations
  47. FACT follow-up of IceCube20171106
  48. IceCube-171106A: Swift Observations
  49. GRB 171010A: afterglow and SN 2017htp optical observations
  50. GRB 171030A: MASTER OT J034412.48-263556.5 featureless continuum spectrum from Lijiang 2.4m (China) telescope and 2m the Himalayan Chandra
  51. GRB 171010A: possible SN component
  52. AMON ICECUBE EHE 130214 (close by time to Fermi trigger): MASTER early follow-up observations
  53. GRB 171030A: MASTER inspection of the IPN error box of the short GRB.
  54. GRB 171102B: RATIR Optical and NIR Observations
  55. GRB 171102B: Swift/UVOT Upper Limits
  56. GRB 171030A: Swift non-localization with BAT, XRT and UVOT
  57. GRB 171030A: Swift ToO observations
  58. Swift Trigger 783893: KAIT Optical Observations
  59. GRB 171027A: KAIT Optical Upper Limit
  60. AMI-LA observations of the new Be X-ray binary Swift J0243.6+6124
  61. Swift Trigger 783893: LCO 1-m telescope observations
  62. GRB 171027A: Swift/UVOT Upper Limits
  63. GRB 171027A: RATIR Confirmation of Fading and Photo-z
  64. GRB 171027A: VLT optical upper limits
  65. GRB 171027A: LCO 1-m telescope observations
  66. GROND observations of GRB 171027A: correction
  67. GRB 171027A: RATIR Detection of a NIR Afterglow Candidate
  68. GROND observations of GRB 171027A
  69. GRB 171027A: MASTER-OAFA (Argentina) early prompt optical observations
  70. Swift trigger 781740: Further analysis from Swift and Fermi/GBM
  71. Fermi GBM Observations of IceCube-171015A
  72. GRB 171020A: Continued RATIR Optical and NIR Observation
  73. GRB 171020A: TAROT Calern observatory optical observations
  74. GRB 171020A: Swift/UVOT Upper Limits
  75. GRB 171020A: RATIR Optical and NIR Observations
  76. GRB 171020A: LT observations
  77. GRB 171020A: NOT optical afterglow detection
  78. Swift Trigger on AXP CXOU J164710.2-455216/PSR J1647-4552
  79. GRB 171010B: Swift-XRT afterglow detection
  80. Trigger 779762: Swift detection of Vela X-1
  81. GRB 171010A: VLA Observations
  82. GRB 171010A: VLA Detection
  83. GRB 171010A: A detection of a radio source by AMI
  84. GRB 171010A : Optical observations from HCT
  85. GRB 171010A: RATIR Optical and NIR Observations
  86. BAT trigger 778435 is not a GRB.
  87. GRB 171010B: Swift-XRT observations
  88. GRB 171013A: TAROT Calern observatory optical observations
  89. GRB 171010A: Swift/UVOT Detection
  90. GRB 171010A: ePESSTO NTT spectroscopic redshift
  91. GRB 171010A: NOT optical observations
  92. GRB 171010B: Swift ToO observations
  93. GRB 171011A: TAROT Calern observatory optical observations
  94. GRB 171011A: MASTER-SAAO optical observations
  95. GRB 171010A: LCO 1m telescope observations
  96. GRB 171010A: Swift-XRT afterglow detection
  97. GRB 171010A: optical observations
  98. GRB 171010A: Swift ToO observations
  99. GRB 171007A: Swift/UVOT Upper Limits
  100. LIGO/Virgo G298048: Mid-Infrared Spitzer/IRAC Observations at 3.6 and 4.5 microns

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